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          <h1 class="post-title" itemprop="name headline">Android-AES加解密</h1>
        

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        <p>####工具类<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * AES加解密工具类, 使用Base64进行编解码</span><br><span class="line"> *     String value = AESUtil.encrypt(&quot;mazaiting&quot;, &quot;123456789&quot;);</span><br><span class="line">       Log.e(&quot;MainActivity&quot;, value);</span><br><span class="line">       Log.e(&quot;MainActivity&quot;, AESUtil.decrypt(&quot;mazaiting&quot;, value));</span><br><span class="line"> * Created by mazaiting on 2018/6/22.</span><br><span class="line"> */</span><br><span class="line"></span><br><span class="line">public class AESUtil &#123;</span><br><span class="line">  /**密钥长度*/</span><br><span class="line">  private static final int KEY_LENGTH = 16;</span><br><span class="line">  /**默认填充位数*/</span><br><span class="line">  private static final String DEFAULT_VALUE = &quot;0&quot;;</span><br><span class="line">  /**</span><br><span class="line">   * 加密</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param src 加密文本</span><br><span class="line">   * @return 加密后的文本</span><br><span class="line">   * @throws Exception</span><br><span class="line">   */</span><br><span class="line">  public static String encrypt(String key, String src) throws Exception &#123;</span><br><span class="line">    // 对源数据进行Base64编码</span><br><span class="line">    src = Base64.encodeToString(src.getBytes(), Base64.DEFAULT);</span><br><span class="line">    // 补全KEY为16位</span><br><span class="line">    byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();</span><br><span class="line">    // 获取加密后的字节数组</span><br><span class="line">    byte[] result = getBytes(rawKey, src.getBytes(&quot;utf-8&quot;), Cipher.ENCRYPT_MODE);</span><br><span class="line">    // 对加密后的字节数组进行Base64编码</span><br><span class="line">    result = Base64.encode(result, Base64.DEFAULT);</span><br><span class="line">    // 返回字符串</span><br><span class="line">    return new String(result, Charset.defaultCharset());</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 解密</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param encrypted 待解密文本</span><br><span class="line">   * @return 返回解密后的数据</span><br><span class="line">   * @throws Exception</span><br><span class="line">   */</span><br><span class="line">  public static String decrypt(String key, String encrypted) throws Exception &#123;</span><br><span class="line">    // 补全KEY为16位</span><br><span class="line">    byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();</span><br><span class="line">    // 获取加密后的二进制字节数组</span><br><span class="line">    byte[] enc = encrypted.getBytes(Charset.defaultCharset());</span><br><span class="line">    // 对二进制数组进行Base64解码</span><br><span class="line">    enc = Base64.decode(enc, Base64.DEFAULT);</span><br><span class="line">    // 获取解密后的二进制字节数组</span><br><span class="line">    byte[] result = getBytes(rawKey, enc, Cipher.DECRYPT_MODE);</span><br><span class="line">    // 对解密后的二进制数组进行Base64解码</span><br><span class="line">    result = Base64.decode(result, Base64.DEFAULT);</span><br><span class="line">    // 返回字符串</span><br><span class="line">    return new String(result, &quot;utf-8&quot;);</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 密钥key ,默认补的数字，补全16位数，以保证安全补全至少16位长度,android和ios对接通过</span><br><span class="line">   * @param key 密钥key</span><br><span class="line">   * @param length 密钥应有的长度</span><br><span class="line">   * @param text 默认补的文本</span><br><span class="line">   * @return 密钥</span><br><span class="line">   */</span><br><span class="line">  private static String toMakeKey(String key, int length, String text) &#123;</span><br><span class="line">    // 获取密钥长度</span><br><span class="line">    int strLen = key.length();</span><br><span class="line">    // 判断长度是否小于应有的长度</span><br><span class="line">    if (strLen &lt; length) &#123;</span><br><span class="line">      // 补全位数</span><br><span class="line">      StringBuilder builder = new StringBuilder();</span><br><span class="line">      // 将key添加至builder中</span><br><span class="line">      builder.append(key);</span><br><span class="line">      // 遍历添加默认文本</span><br><span class="line">      for (int i = 0; i &lt; length - strLen; i++) &#123;</span><br><span class="line">        builder.append(text);</span><br><span class="line">      &#125;</span><br><span class="line">      // 赋值</span><br><span class="line">      key = builder.toString();</span><br><span class="line">    &#125;</span><br><span class="line">    return key;</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 加解密过程</span><br><span class="line">   * 1. 通过密钥得到一个密钥专用的对象SecretKeySpec</span><br><span class="line">   * 2. Cipher 加密算法，加密模式和填充方式三部分或指定加密算 (可以只用写算法然后用默认的其他方式)Cipher.getInstance(&quot;AES&quot;);</span><br><span class="line">   * @param key 二进制密钥数组</span><br><span class="line">   * @param src 加解密的源二进制数据</span><br><span class="line">   * @param mode 模式，加密为：Cipher.ENCRYPT_MODE;解密为：Cipher.DECRYPT_MODE</span><br><span class="line">   * @return 加解密后的二进制数组</span><br><span class="line">   * @throws NoSuchAlgorithmException 无效算法</span><br><span class="line">   * @throws NoSuchPaddingException 无效填充</span><br><span class="line">   * @throws InvalidKeyException 无效KEY</span><br><span class="line">   * @throws InvalidAlgorithmParameterException 无效密钥</span><br><span class="line">   * @throws IllegalBlockSizeException 非法块字节</span><br><span class="line">   * @throws BadPaddingException 坏数据</span><br><span class="line">   */</span><br><span class="line">  private static byte[] getBytes(byte[] key, byte[] src, int mode) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException &#123;</span><br><span class="line">    // 密钥规格</span><br><span class="line">    SecretKeySpec secretKeySpec = new SecretKeySpec(key, &quot;AES&quot;);</span><br><span class="line">    // 密钥实例</span><br><span class="line">    Cipher cipher = Cipher.getInstance(&quot;AES&quot;);</span><br><span class="line">    // 初始化密钥模式</span><br><span class="line">    cipher.init(mode, secretKeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));</span><br><span class="line">    // 加密数据</span><br><span class="line">    return cipher.doFinal(src);</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<a id="more"></a>
<p>####使用<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">String value = AESUtil.encrypt(&quot;mazaiting&quot;, &quot;123456789&quot;);</span><br><span class="line"> Log.e(&quot;MainActivity&quot;, value);</span><br><span class="line"> Log.e(&quot;MainActivity&quot;, AESUtil.decrypt(&quot;mazaiting&quot;, value));</span><br></pre></td></tr></table></figure></p>
<p>####加密文件及字符串工具类<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span 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class="line">301</span><br><span class="line">302</span><br><span class="line">303</span><br><span class="line">304</span><br><span class="line">305</span><br><span class="line">306</span><br><span class="line">307</span><br><span class="line">308</span><br><span class="line">309</span><br><span class="line">310</span><br><span class="line">311</span><br><span class="line">312</span><br><span class="line">313</span><br><span class="line">314</span><br><span class="line">315</span><br><span class="line">316</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * Aes加密工具类</span><br><span class="line"> * 使用：</span><br><span class="line"> *          val value = AESUtil.encrypt(&quot;mazaiting&quot;, &quot;123456789&quot;)</span><br><span class="line">            Log.e(&quot;MainActivity&quot;, value)</span><br><span class="line">            Log.e(&quot;MainActivity&quot;, AESUtil.decrypt(&quot;mazaiting&quot;, value))</span><br><span class="line"> *</span><br><span class="line"> * Created by mazaiting on 2018/6/21.</span><br><span class="line"> */</span><br><span class="line"></span><br><span class="line">public class AESUtil &#123;</span><br><span class="line">  /**16进制数*/</span><br><span class="line">  private final static String HEX = &quot;0123456789ABCDEF&quot;;</span><br><span class="line">  /**密钥长度*/</span><br><span class="line">  private static final int KEY_LENGTH = 16;</span><br><span class="line">  /**默认填充位数*/</span><br><span class="line">  private static final String DEFAULT_VALUE = &quot;0&quot;;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 加密</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param src 加密文本</span><br><span class="line">   * @return 加密后的文本</span><br><span class="line">   * @throws Exception</span><br><span class="line">   */</span><br><span class="line">  public static String encrypt(String key, String src) throws Exception &#123;</span><br><span class="line">    // 对源数据进行Base64编码</span><br><span class="line">    src = Base64.encodeToString(src.getBytes(), Base64.DEFAULT);</span><br><span class="line">    // 补全KEY为16位</span><br><span class="line">    byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();</span><br><span class="line">    // 获取加密后的字节数组</span><br><span class="line">    byte[] result = getBytes(rawKey, src.getBytes(&quot;utf-8&quot;),&quot;AES&quot;, Cipher.ENCRYPT_MODE);</span><br><span class="line">    // 对加密后的字节数组进行Base64编码</span><br><span class="line">    result = Base64.encode(result, Base64.DEFAULT);</span><br><span class="line">    // 返回字符串</span><br><span class="line">    return new String(result, Charset.defaultCharset());</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 解密</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param encrypted 待解密文本</span><br><span class="line">   * @return 返回解密后的数据</span><br><span class="line">   * @throws Exception</span><br><span class="line">   */</span><br><span class="line">  public static String decrypt(String key, String encrypted) throws Exception &#123;</span><br><span class="line">    // 补全KEY为16位</span><br><span class="line">    byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();</span><br><span class="line">    // 获取加密后的二进制字节数组</span><br><span class="line">    byte[] enc = encrypted.getBytes(Charset.defaultCharset());</span><br><span class="line">    // 对二进制数组进行Base64解码</span><br><span class="line">    enc = Base64.decode(enc, Base64.DEFAULT);</span><br><span class="line">    // 获取解密后的二进制字节数组</span><br><span class="line">    byte[] result = getBytes(rawKey, enc,&quot;AES&quot;, Cipher.DECRYPT_MODE);</span><br><span class="line">    // 对解密后的二进制数组进行Base64解码</span><br><span class="line">    result = Base64.decode(result, Base64.DEFAULT);</span><br><span class="line">    // 返回字符串</span><br><span class="line">    return new String(result, &quot;utf-8&quot;);</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 加密</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param src 加密文本</span><br><span class="line">   * @return 加密后的数据</span><br><span class="line">   * @throws Exception</span><br><span class="line">   */</span><br><span class="line">  public static String encrypt2Java(String key, String src) throws Exception &#123;</span><br><span class="line">    // /src = Base64.encodeToString(src.getBytes(), Base64.DEFAULT);</span><br><span class="line">    byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();// key.getBytes();</span><br><span class="line">//    byte[] result = encrypt2Java(rawKey, src.getBytes(&quot;utf-8&quot;));</span><br><span class="line">    byte[] result = getBytes(rawKey, src.getBytes(&quot;utf-8&quot;), &quot;AES/CBC/PKCS5Padding&quot;, Cipher.ENCRYPT_MODE);</span><br><span class="line">    // result = Base64.encode(result, Base64.DEFAULT);</span><br><span class="line">    return toHex(result);</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 加密</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param src 加密文本</span><br><span class="line">   * @return 加密后的数据</span><br><span class="line">   * @throws Exception</span><br><span class="line">   */</span><br><span class="line">  public static String decrypt2Java(String key, String src) throws Exception &#123;</span><br><span class="line">    // /src = Base64.encodeToString(src.getBytes(), Base64.DEFAULT);</span><br><span class="line">    byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();// key.getBytes();</span><br><span class="line">    byte[] result = getBytes(rawKey, src.getBytes(&quot;utf-8&quot;), &quot;AES/CBC/PKCS5Padding&quot;, Cipher.DECRYPT_MODE);</span><br><span class="line">    // result = Base64.encode(result, Base64.DEFAULT);</span><br><span class="line">    return toHex(result);</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 密钥key ,默认补的数字，补全16位数，以保证安全补全至少16位长度,android和ios对接通过</span><br><span class="line">   * @param key 密钥key</span><br><span class="line">   * @param length 密钥应有的长度</span><br><span class="line">   * @param text 默认补的文本</span><br><span class="line">   * @return 密钥</span><br><span class="line">   */</span><br><span class="line">  private static String toMakeKey(String key, int length, String text) &#123;</span><br><span class="line">    // 获取密钥长度</span><br><span class="line">    int strLen = key.length();</span><br><span class="line">    // 判断长度是否小于应有的长度</span><br><span class="line">    if (strLen &lt; length) &#123;</span><br><span class="line">      // 补全位数</span><br><span class="line">      StringBuilder builder = new StringBuilder();</span><br><span class="line">      // 将key添加至builder中</span><br><span class="line">      builder.append(key);</span><br><span class="line">      // 遍历添加默认文本</span><br><span class="line">      for (int i = 0; i &lt; length - strLen; i++) &#123;</span><br><span class="line">        builder.append(text);</span><br><span class="line">      &#125;</span><br><span class="line">      // 赋值</span><br><span class="line">      key = builder.toString();</span><br><span class="line">    &#125;</span><br><span class="line">    return key;</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 加解密过程</span><br><span class="line">   * 1. 通过密钥得到一个密钥专用的对象SecretKeySpec</span><br><span class="line">   * 2. Cipher 加密算法，加密模式和填充方式三部分或指定加密算 (可以只用写算法然后用默认的其他方式)Cipher.getInstance(&quot;AES&quot;);</span><br><span class="line">   * @param key 二进制密钥数组</span><br><span class="line">   * @param src 加解密的源二进制数据</span><br><span class="line">   * @param mode 模式，加密为：Cipher.ENCRYPT_MODE;解密为：Cipher.DECRYPT_MODE</span><br><span class="line">   * @return 加解密后的二进制数组</span><br><span class="line">   * @throws NoSuchAlgorithmException 无效算法</span><br><span class="line">   * @throws NoSuchPaddingException 无效填充</span><br><span class="line">   * @throws InvalidKeyException 无效KEY</span><br><span class="line">   * @throws InvalidAlgorithmParameterException 无效密钥</span><br><span class="line">   * @throws IllegalBlockSizeException 非法块字节</span><br><span class="line">   * @throws BadPaddingException 坏数据</span><br><span class="line">   */</span><br><span class="line">  private static byte[] getBytes(byte[] key, byte[] src,String transformation, int mode) throws</span><br><span class="line">          NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,</span><br><span class="line">          InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException &#123;</span><br><span class="line">    // 密钥规格</span><br><span class="line">    SecretKeySpec secretKeySpec = new SecretKeySpec(key, &quot;AES&quot;);</span><br><span class="line">    // 密钥实例</span><br><span class="line">    Cipher cipher = Cipher.getInstance(transformation);</span><br><span class="line">    // 初始化密钥模式</span><br><span class="line">    cipher.init(mode, secretKeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));</span><br><span class="line">    // 加密数据</span><br><span class="line">    return cipher.doFinal(src);</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**获取16进制字符串*/</span><br><span class="line">  public static String toHex(String txt) &#123;</span><br><span class="line">    return toHex(txt.getBytes());</span><br><span class="line">  &#125;</span><br><span class="line">  /**将16进制字符串转换为未编码后的数据*/</span><br><span class="line">  public static String fromHex(String hex) &#123;</span><br><span class="line">    return new String(toByte(hex));</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 把16进制转化为字节数组</span><br><span class="line">   * @param hexString 16进制字符串</span><br><span class="line">   * @return 加密后的字节数组</span><br><span class="line">   */</span><br><span class="line">  private static byte[] toByte(String hexString) &#123;</span><br><span class="line">    // 获取源数据长度</span><br><span class="line">    int len = hexString.length() / 2;</span><br><span class="line">    // 创建字节数组</span><br><span class="line">    byte[] result = new byte[len];</span><br><span class="line">    // 遍历</span><br><span class="line">    for (int i = 0; i &lt; len; i++)</span><br><span class="line">      result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue();</span><br><span class="line">    // 返回二进制字节数组</span><br><span class="line">    return result;</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 二进制转字符,转成了16进制</span><br><span class="line">   * 0123456789abcdef</span><br><span class="line">   * @param bytes 字节组数</span><br><span class="line">   * @return 16进制编码的字符串</span><br><span class="line">   */</span><br><span class="line">  private static String toHex(byte[] bytes) &#123;</span><br><span class="line">    // 判断二进制数组长度是否小于0</span><br><span class="line">    if (bytes.length &lt;= 0) return &quot;&quot;;</span><br><span class="line">    // 创建字符串连接对象</span><br><span class="line">    StringBuilder builder = new StringBuilder(2 * bytes.length);</span><br><span class="line">    for (byte b : bytes) &#123;</span><br><span class="line">      // 拼接字符</span><br><span class="line">      builder.append(HEX.charAt((b &gt;&gt; 4) &amp; 0x0f)).append(HEX.charAt(b &amp; 0x0f));</span><br><span class="line">    &#125;</span><br><span class="line">    // 返回字符串</span><br><span class="line">    return builder.toString();</span><br><span class="line">  &#125;</span><br><span class="line">    </span><br><span class="line">  /**</span><br><span class="line">   * 对文件进行AES加密</span><br><span class="line">   * @param sourceFile 待加密文件</span><br><span class="line">   * @param toFile 加密后的文件</span><br><span class="line">   * @param dir 文件存储路径</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @return 加密后的文件</span><br><span class="line">   */</span><br><span class="line">  public static File encryptFile(File sourceFile, String toFile, String dir, String key) &#123;</span><br><span class="line">    // 新建临时加密文件</span><br><span class="line">    File encryptFile = null;</span><br><span class="line">    // 输入流</span><br><span class="line">    InputStream inputStream = null;</span><br><span class="line">    // 输出流</span><br><span class="line">    OutputStream outputStream = null;</span><br><span class="line">    try &#123;</span><br><span class="line">      // 读取源文件，创建文件输入流</span><br><span class="line">      inputStream = new FileInputStream(sourceFile);</span><br><span class="line">      // 创建加密后的文件</span><br><span class="line">      encryptFile = new File(dir + toFile);</span><br><span class="line">      // 根据文件创建输出流</span><br><span class="line">      outputStream = new FileOutputStream(encryptFile);</span><br><span class="line">      // 初始化 Cipher</span><br><span class="line">      Cipher cipher = initAESCipher(key, Cipher.ENCRYPT_MODE);</span><br><span class="line">      // 以加密流写入文件</span><br><span class="line">      CipherInputStream cipherInputStream = new CipherInputStream(inputStream, cipher);</span><br><span class="line">      // 创建缓存字节数组</span><br><span class="line">      byte[] cache = new byte[1024];</span><br><span class="line">      // 读取</span><br><span class="line">      int len;</span><br><span class="line">      // 读取加密并写入文件</span><br><span class="line">      while ((len = cipherInputStream.read(cache)) != -1) &#123;</span><br><span class="line">        outputStream.write(cache, 0, len);</span><br><span class="line">        outputStream.flush();</span><br><span class="line">      &#125;</span><br><span class="line">      // 关闭加密输入流</span><br><span class="line">      cipherInputStream.close();</span><br><span class="line">    &#125; catch (IOException e) &#123;</span><br><span class="line">      e.printStackTrace();</span><br><span class="line">    &#125; finally &#123;</span><br><span class="line">      closeStream(inputStream);</span><br><span class="line">      closeStream(outputStream);</span><br><span class="line">    &#125;</span><br><span class="line">    return encryptFile;</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * AES方式解密文件</span><br><span class="line">   * @param sourceFile 源文件</span><br><span class="line">   * @param toFile 目标文件</span><br><span class="line">   * @param dir 文件存储路径</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @return</span><br><span class="line">   */</span><br><span class="line">  public static File decryptFile(File sourceFile, String toFile, String dir, String key) &#123;</span><br><span class="line">    // 解密文件</span><br><span class="line">    File decryptFile = null;</span><br><span class="line">    // 文件输入流</span><br><span class="line">    InputStream inputStream = null;</span><br><span class="line">    // 文件输出流</span><br><span class="line">    OutputStream outputStream = null;</span><br><span class="line">    try &#123;</span><br><span class="line">      // 创建解密文件</span><br><span class="line">      decryptFile = new File(dir + toFile);</span><br><span class="line">      // 初始化Cipher</span><br><span class="line">      Cipher cipher = initAESCipher(key, Cipher.DECRYPT_MODE);</span><br><span class="line">      // 根据源文件创建输入流</span><br><span class="line">      inputStream = new FileInputStream(sourceFile);</span><br><span class="line">      // 创建输出流</span><br><span class="line">      outputStream = new FileOutputStream(decryptFile);</span><br><span class="line">      // 获取解密输出流</span><br><span class="line">      CipherOutputStream cipherOutputStream = new CipherOutputStream(outputStream, cipher);</span><br><span class="line">      // 创建缓冲字节数组</span><br><span class="line">      byte[] buffer = new byte[1024];</span><br><span class="line">      int len;</span><br><span class="line">      // 读取解密并写入</span><br><span class="line">      while ((len = inputStream.read(buffer)) &gt;= 0) &#123;</span><br><span class="line">        cipherOutputStream.write(buffer, 0, len);</span><br><span class="line">        cipherOutputStream.flush();</span><br><span class="line">      &#125;</span><br><span class="line">      // 关闭流</span><br><span class="line">      cipherOutputStream.close();</span><br><span class="line">    &#125; catch (IOException e) &#123;</span><br><span class="line">      e.printStackTrace();</span><br><span class="line">    &#125; finally &#123;</span><br><span class="line">      closeStream(inputStream);</span><br><span class="line">      closeStream(outputStream);</span><br><span class="line">    &#125;</span><br><span class="line">    return decryptFile;</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 初始化 AES Cipher</span><br><span class="line">   * @param key 密钥</span><br><span class="line">   * @param cipherMode 加密模式</span><br><span class="line">   * @return 密钥</span><br><span class="line">   */</span><br><span class="line">  private static Cipher initAESCipher(String key, int cipherMode) &#123;</span><br><span class="line">    Cipher cipher = null;</span><br><span class="line">    try &#123;</span><br><span class="line">      // 将KEY进行修正</span><br><span class="line">      byte[] rawKey = toMakeKey(key, KEY_LENGTH, DEFAULT_VALUE).getBytes();</span><br><span class="line">      // 创建密钥规格</span><br><span class="line">      SecretKeySpec secretKeySpec = new SecretKeySpec(rawKey, &quot;AES&quot;);</span><br><span class="line">      // 获取密钥</span><br><span class="line">      cipher = Cipher.getInstance(&quot;AES&quot;);</span><br><span class="line">      // 初始化</span><br><span class="line">      cipher.init(cipherMode, secretKeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));</span><br><span class="line">    &#125; catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidAlgorithmParameterException | InvalidKeyException e) &#123;</span><br><span class="line">      e.printStackTrace();</span><br><span class="line">    &#125;</span><br><span class="line">    return cipher;</span><br><span class="line">  &#125;</span><br><span class="line">  </span><br><span class="line">  /**</span><br><span class="line">   * 关闭流</span><br><span class="line">   * @param closeable 实现Closeable接口</span><br><span class="line">   */</span><br><span class="line">  private static void closeStream(Closeable closeable) &#123;</span><br><span class="line">    try &#123;</span><br><span class="line">      closeable.close();</span><br><span class="line">    &#125; catch (IOException e) &#123;</span><br><span class="line">      e.printStackTrace();</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>

      
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